Sure they do. That's why I have BrM offspec. And would have had a rogue and guardian alt if that would be doable w/o spending 100 hours on leveling+gearing.
Lower-populated lower-skilled guilds, or a social groups that is willing to raid but not to fish for optimal setups (that could change 1 patch later) will exist. Thats why WW's have a decent chance to raid something.
I don't know how they do get their spots on current HC content though, but yet again, those are rare birds.